53-68. Of course this is just a case of study, and these results depend on your area of study. Initially it was looked for information and training with Laser Scanner technology owners in the country. Can a single card have multiple activations on a stack? To assess GE’s elevation accuracy for transportation use, roadway monuments directly adjacent to the roadways of interest are utilized as the second source of ground truth data. The. The magnitude of residuals for NW, W and SW facing slope was smaller as compared to their complementary angle. instrument height to relate the location of the instrument to the known ground coordinates. What is the reason for the date of the Georgia runoff elections for the US Senate? software allows the user to specify the interpolation method (griding method) to be used. here. Considering the resolution of the GE viewbox, the displayed area in the GE form for extraction should not be very large and can be regarded as a plane. No, Is the Subject Area "Data processing" applicable to this article? and P.B.S. I suppose that in the US the results … Yes With Google Earth 6.2.2.6613 (Build Date 4/11/2012) I get 470'7" to within about a foot. Aggregating this information over a geographic area can provide accurate RAP locations along with quantity information for entire regions or states and within a range of years. by admin | Jul 16, 2018 | Blog, MiTS 2, Technical Documentation | 0 comments. The results showed that the accuracies for the prepared DEMs are suitable for some certain engineering applications but inadequate to meet the standard required for fine/small scale DEM for very precise engineering study. ASPRS accuracy standards for large-scale maps. The observed root mean square error (RMSE) (27.58 ± 4.22 m) for the region do not fulfill the 16 m RMSE specification of the SRTM mission. Golden Software (2012), Surfer Version 11: Reference Manual. PLoS ONE 12(4): 3.2 Exporting the elevation data of Google Earth, Google Earth elevation data of each region were extracted using free source online tool, named Terrain Zonum (Terrain Zonum, 2015) via this website. Analysis of the results of geodetic measurements of the reference base segments showed the discrepancy between the increase of the increase of the measured distance. Thanks for the response. Join ResearchGate to find the people and research you need to help your work. (5) with regard to SLR. islands are more likely to be close to the sea level, and that means (Online), Vol. Department of Transportation Engineering, Myongji University, Seoul, Korea. Moreover, DEMs are used often in geographic information systems (GIS), and are the most common basis for digitally-produced relief maps. Accuracy of such dataset is The Elevation API returns data for single point queries of the highest accuracy possible. https://doi.org/10.1371/journal.pone.0175756.g007. If the terrain is, highly vegetated, slope steeply than accuracy may be further reduced. Thanks for subscribing! To extract the roadway elevation and grade, a Google Earth Elevation Data Extraction System (GEEDES) was developed at the Smart Transportation Applications and Research Laboratory (STAR Lab) of the University of Washington using the GE API. operation that would eventually lead to engineering construction. . All these accuracy statistics were computed using the ground coordinates of 200 reference points for each region of the case study. Almost perfect. The positive mean error (6.77 ± 1.79 m) indicated that the SRTM DEM was slightly underestimating the elevation and this pattern gradually increases towards higher elevation. Bhadoria (2010), Vertical Accuracy of Digital Elevation. strength of the foregoing, G.E. (11) However, it has been challenging to obtain such data and most roadway GIS databases do not have them. Previous research has shown that vehicle performance and fuel efficiency are significantly affected by roadway elevation changes. These regions are Region 1, Region 2 and Region 3 and lie in Dabaa, El-Alamain and, Marsa Mattroh cities respectively. 102, pp C 33 – C 49. 2, 2015 from http://earth.google.com/support/bin/answer.py?&answer=176147, Hoffmann, E. and F. Winde (2010). level. *the error is just 1,39% for perimeters calculation; Based on these results they concluded that you can use Google Earth as a good source for mapping in scales smaller than 1:150000, assuming the planimetrical error as 0,1 mm. The next stage consisted of Laser Scanner point cloud treatment, using for that programs CAD and specific programs for work of data laser. @art A quick test (measuring a great circle of 40,000 km) suggests the accuracy is pretty good--far greater than one would expect from the orthographic projection used. We do know that Google doesn’t use surveyor data. 3.3 Transformation of WGS84 latitude and longitude to UTM East and North, A position on the Earth is given by the UTM zone number and the easting and northing, coordinate pair in that zone. Generating high-resolution digital elevation models for. It is a product of Golden, Inc., Surfer software reads the input data in the form of X, Y, Z ground coordinates of the, irregularly and regularly spaced data points and creates a regularly gridded DTM for each, region from which quasi-continuous surfaces could be produced. models of which Google Earth (G.E.) I tab back with the historical imagery to 2016 and all is back to NAVD88. It only takes a minute to sign up. The reference data was collected with total station survey. Yes Topcon (2013), Retrieved on March 25, 2013 from http://www.topcon.co.jp/en/index.html, https://content.sciendo.com uses cookies to store information that enables us to optimize our website and make browsing more comfortable for you. Currently available datasets include the global 30 arc-second elevation (GTOPO30) dataset [9], elevation dataset from Shuttle Radar Topography Mission (SRTM) [10], National Elevation Dataset from the U.S. Geological Survey (USGS NED) [11], Global Digital Elevation Model (GDEM) [12], and Light Detection and Ranging (LIDAR) [13] elevation datasets. The quality of the DEM. Coastal Vulnerability Index (CVI) was computed (18) (1993). too. They are of particular value in areas of comparatively flat topography, where such tasks are often difficult to perform. and save as text file for further processing. High magnitude errors are typical to steep slope (due to overestimation) and in stream valley (due to underestimation). Contour lines, slope - aspect maps are part of their many uses. After just installing a break water and knowing all the dimensions, i checked it on google earth to see how close the eye in the sky is, on 470 ft it showed 477 ft, I tried google earth pro it did not make a difference. 51608386), and Shanghai Sailing Program (grant no. Along the last decades, photogrammetric techniques consolidated in highways implantation studies. Then had someone physically measure it. Share your story with the world. lisadoc Well-Known Member. These are provided for entertainment only and should not be used for any navigational or other purpose requiring any accuracy whatsoever". Also, the. Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported, Morphotectonic Kinematic Indicators along the Vigan-Aggao Fault: The Western Deformation Front of the Philippine Fault Zone in Northern Luzon, the Philippines, A GIS Science Simulation for the Expected Sea Level Rise Scenarios on Failaka Island in the State of Kuwait, Application of satellite imagery in estimating stockpiled reclaimed asphalt pavement (RAP) inventory: A Washington State case study, An evaluation of available digital elevation models (DEMs) for geomorphological feature analysis, Obtaining elevation of Oncomelania Hupensis habitat based on Google Earth and it’s accuracy evaluation: an example from the Poyang lake region, China, EVALUATION OF SATELLITE INPUT DATA PERFORMANCE IN MODELING WATER DISTRIBUTION NETWORK: A CASE OF KOYE-FECHE, ADDIS ABABA, ETHIOPIA, An ethnographic justification for establishment of a contextual engineering discipline, Positional Accuracy Evaluation of Google Earth in Addis Ababa, Ethiopia, Comparative Analysis of Google Earth Derived Elevation with In-Situ Total Station Method for Engineering Constructions, AEKF-Based 3-D Localization of Road Surface Images with Sparse Low-Accuracy GPS Data, Generating high-resolution digital elevation models for wetland research using Google EarthTM imagery - An example from South Africa, Vertical Accuracy of Digital Elevation Model from Shuttle Radar Topographic Mission – A Case Study.

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